Abstract: A picture processing apparatus and method for enlarging and reducing a picture wherein when a picture is reduced, horizontally adjacent pixel data is supplied from a delaying device to a horizontally interpolating circuit. With the pixel data, a coefficient p and a 1's complement (1-p) thereof supplied from an interpolation coefficient circuit, an interpolating process in the horizontal direction is performed. In addition, a pixel at the position of p=1 is thinned out. Pixel data that has been interpolated in the horizontal and vertical directions and that has been thinned out is written to a memory. When a picture is enlarged, pixel data that is read from a memory is delayed by two line memories and two adjacent pixels are properly selected by a switch circuit. A vertically interpolating circuit performs an interpolating process in the vertical direction. When pixel data is read from the memory, particular pixel data is read twice depending on a magnification.

Abstract: An image reconstruction system adaptively de-interlaces video stream content using image data comparison techniques when the interlaced input video stream does not contain pre-coded non-interlaced to interlaced conversion status data. In one embodiment, the system uses a signature generator which generates a plurality of field signature values on a per field basis by determining region values based on fluctuations in pixel data, such as luminance data within a horizontal scan line to detect changes in motion. The field signature values are then analyzed to determine a probability that the content is one of several types such as content that has undergone non-interlaced to interlaced conversion, such as pull down conversion for film captured content. Also, independent of whether conversion has occurred, the system analyzes the video streams to determine whether the video stream contains a paused image or slow motion playback of images and de-interlaces accordingly.

Abstract: Digital broadcast receiving terminal apparatus which receives multi-channel digital broadcast signals to record the huge capacity without deteriorating the quality of signals and to visualize the digital broadcasting. The outputs form the error correction decoding circus 4 are applied to the TS processor 12 via the switches SW 1 and SW 2, at the same time they are applied to the recording program selector 11. The recording program selector 11 applies the encoded data of the predetermined program to the digital interface 13, the digital interface 13 inputs and outputs the encoded data through bus in the IEEE1394 specification for example. Thus, the encoded data are applied to the external equipment and recorded as they are, and the degradation of the quality can be prevented. The switches SW 1 and SW 2 changes the receiving signals and the outputs from the digital interface 13 and applies them to the TS processor 12. The TS processor 12 depacketizes the input encoded data.

Abstract: Methods and apparatus for implementing a reduced cost HDTV/SDTV video decoder are disclosed. The described joint video decoder is capable of decoding HDTV pictures at approximately the resolution of standard definition television pictures and can be used to decode HDTV and/or SDTV pictures. The described video decoder may be used as part of a picture-in-picture decoder circuit for providing picture-in-picture capability without providing multiple full resolution video decoders. The reduction in decoder circuit complexity is achieved through the use of a plurality of data reduction techniques including the use of a preparser, downsampling, and truncating pixel values.

Abstract: An apparatus and method for inputting one or more video signals, synthesizing the video signals and outputting the synthesized video signals with aspect information. The aspect information represents an aspect ratio of the synthesized video signal. The aspect information may be superposed within the vertical blanking period.

Abstract: A display apparatus includes a luminance change detecting unit for detecting change of luminance of a cathode ray tube, a deflection size control quantity adjusting unit connected to the luminance change detecting unit for stabilizing a deflection size by changing a deflection size correcting quantity at different rates of change for a low luminance range and a high luminance range, respectively, on the basis of the detected change of luminance. The deflection size control quantity adjusting unit generates a proper deflection size control quantity adjusting voltage by synthesizing a high frequency component and a low frequency component contained in a signal indicating the luminance change with different gains, respectively.

Abstract: An audio/video production system facilitates professional quality image manipulation and editing. A program input may be translated into any of a variety of graphics or television formats, including NTSC, PAL, SECAM and HDTV, and stored as data-compressed images, using any of several commercially available methods such as Motion JPEG, MPEG, etc. While being processed, the images may be re-sized to produce a desired aspect ratio or dimensions using conventional techniques such as pixel interpolation, and signals within the video data stream optionally may be utilized to control "pan/scan" operations at a receiving video display unit, in case this unit does not have the same aspect ratio as the source signal. Other information may be utilized to. restrict playback of the program material based on predetermined regional or geographical criteria.

Abstract: A picture-display-region discriminating apparatus comprising a device for setting a number of picture detection regions on a display screen of a television receiver, a detecting device for detecting a level of a video signal corresponding to each picture detection region by utilizing two reference levels, and a device for determining whether or not a picture exists in each picture detection region based on detection results from the detecting device. One of the reference levels utilized by the detecting device is a black level of a luminance signal of the video signal and the other reference level utilized therewith is a white level of the luminance signal of the video signal.

Abstract: Controlling the screen size of a wide display monitor, by which the screen size can be regulated by the user's pressing a key such that the screen is maintained stable according to the switching of wide view mode and/or expanded view mode, wherein a display mode and a DAC level dependent upon the display mode are selected. It is then checked to make sure that the DAC level is entered, when the display mode and the DAC level are entered. Then the DAC levels of horizontal and vertical sizes are calculated, and the screen size is controlled according to the calculated DAC levels of the horizontal and vertical sizes.

Abstract: A television receiver comprising a video display with a wide width to height ratio, horizontal and vertical deflection circuits for generating selectable rasters of different sizes on the video display by modifying horizontal deflection signals, a circuit (Rs) responsive to a vertical deflection signal and generating a first control signal, a waveform generator responsive to the first control signal and generating a substantially parabolic signal, a raster distortion correction circuit responsive to the substantially parabolic signal, and a source of a second control signal indicative of a selected horizontal raster width and the horizontal deflection being modified responsive to the second control signal.

Abstract: In order to play back a plurality of kinds of image data using a single device, a 1394 receiver receives data transmitted via an AV bus according to a format of an IEEE 1394 standard. A separating circuit then determines a format of this data by referring to a prescribed region of a CIP header of this data. When this data is MPEG-PS data, this data is outputted to an MPEG-PS decoder. When this data is MPEG-TS data, this data is outputted to an MPEG-TS decoder. When this data is DVCR SD data, this data is outputted to a DVCR-SD decoder. The MPEG-PS decoder, MPEG-TS decoder and the DVCR-SD decoder then decode the supplied data of respective formats.

Abstract: A semi-wide view display method and device using the same are provided with a semi-wide view function for arbitrarily converting an aspect ratio of a screen in a television. The method includes the steps of setting a display mode according to a user-selected aspect ratio of a television screen; receiving vertical and horizontal blanking pulses, controlling the width of the blanking pulse according to the display mode setting, and outputting the result; generating a television signal which is displayed on the screen and a blanking signal which is not displayed on the screen by inputting the generated blanking pulse; and displaying the television and the blanking signal to thereby control vertical/horizontal over-scanning and vertically lengthen a blanking period, in order to convert the aspect ratio of the displayed image.

Abstract: An aspect ratio discrimination apparatus and an image display apparatus which prevent a malfunction in discrimination of a first video signal for exhibition of a normal image and a second video signal for exhibition of a horizontally elongated image. An upper-lower portion average brightness calculation section receives an input video signal to form an image and calculates an average brightness of upper and lower portions (black band portions) of the image. An upper-lower portion brightness difference calculation section calculates differences between the average brightness and brightness levels of the black portions of the image. A high brightness difference rate detection section discriminates whether or not the rate of the area of portions in the black portions in which the brightness differences are higher than a predetermined level is higher than a predetermined value.

Abstract: An image processing apparatus capable of producing a multi-image from images based on different video signal standards. A first switch selects a video signal which has been subjected to input processing by an input processing circuit, and a second switch selects a synchronizing signal separated from the input processing circuit. The output of the first switch is applied to an image memory via a low-pass filter and an analog-to-digital converter. A reduction control circuit outputs to a memory control circuit a horizontal/vertical enable signal at a timing based on a reduction ratio k (0<k.ltoreq.1) received from a CPU in accordance with the synchronizing signal received from the second switch. The memory control circuit controls the write to the image memory according to the synchronizing signal received from the second switch and the enable signal received from the reduction control circuit and it also controls a write address in accordance with storing coordinate information received from the CPU.

Abstract: A pump-up circuit includes a first capacitor C1 connected to the power supply Vcc via a first change-over switch SW1 to the reference potential point or a second capacitor C2. The second capacitor C2 is charged by the voltage control circuit 45 under the control of the pump-up voltage control signal so that the capacitors C1 and C2 are charged respectively during the scanning period. Upon input of a NTSC signal, the change-over switch SW1 is connected to the reference potential point and the charging voltage of the first capacitor C1 is used as the pump-up voltage. Upon input of a signal having a short vertical flyback period such as the signal from personal computers, the total of the charging voltages at the first and second capacitors C1 and C2 is used as the pump-up voltage.

Abstract: A matrix type display device capable of receiving more than one video signal, which displays an image based on a first video signal with a smaller aspect ratio than an aspect ratio of a screen in width by inputting a second video signal in sync with a first video signal to at least a part of column drivers corresponding to a remaining portion on the screen where the image based on the first video signal is not displayed, so that the processing of the first and second video signals is started at the same time and carried out at the same timing. Consequently, the present matrix type display device can readily display a natural image based on an input video signal with a smaller aspect ratio than the that of the screen.

Abstract: An automatic aspect ratio switching apparatus for automatically switching an aspect ratio is provided. The apparatus includes a satellite intermediate frequency processor which demodulates the broadcast signal from an intermediate frequency signal received from the satellite. A decoder detects aspect ratio support data which is included in the satellite broadcasting signal. Based on this detected aspect ratio support data, the deflection of the electron beam in the display of the television receiver is automatically caused to correspond to the aspect ratio of the broadcast signal. Accordingly, an aspect ratio can be automatically switched according to the aspect ratio support data inserted on the broadcasting signal sent by a broadcasting station without manual operation of a key.

Abstract: A digital bit stream including video data is transmitted via a digital video transmission system for presentation on a television receiver. The video data is suitable for viewing on a television receiver having a first aspect ratio. Transmitted within a predefined field of the digital bit stream are pan-edit vectors which, when applied to the video data, produce a resulting signal suitable for presentation on a television receiver having a second aspect ratio. The digital video signal may comprise an MPEG video stream. The digital video transmission system may include a transmission link, such as a satellite transmission system, for transmission of the digital bit stream.

Abstract: According to the signal processing method of the invention, control data is previously generated by using the name of a control signal included in an object signal, and then, the object signal including the control signal is input. The name of the control signal in the control data is substituted with the content of the control signal included in the object signal, and then the object signal is processed by a signal processing unit by using the control data including the content of the control signal. Therefore, the signal processing unit can change the processing to be performed on the object signal in accordance with the content of the control signal included in the object signal.

Abstract: An aspect ratio converter converts the input aspect ratio of an input video signal to an output aspect ratio. The input video signal contains partial area information representing a portion of the input video signal which constitutes substantially all of the video picture with the desired output aspect ratio. The input video signal is stored in an addressable memory and is read out from those addresses corresponding to the partial area of the input video signal.

Abstract: The present invention provides an image display apparatus equipped with a common terminal section 10 to which a single-density signal and a double-density signal each having different horizontal scanning frequencies to each other are commonly connected. The single-density and double-density signals are selectively inputted to the single-density signal processing circuit 5 or the double-density signal processing circuit 6 by a switching operation of a switch 11. A synch-signal separation circuit 13 separates a synchronous signal carrying the horizontal scanning frequency from the signal inputted to the common terminal section 10. An fV-conversion circuit 14 converts a horizontal scanning frequency of the synchronous signal into a voltage. A frequency discrimination circuit 15 detects the horizontal scanning frequency and memorize it in a look-up table of a memory device 16.

Abstract: A device for controlling an aspect ratio in a TV-computer integrated wide screen receiver, includes an input signal select switch for selecting a television signal double-scanned or a computer monitor signal of a VGA mode, a gain controller for controlling a gain of the signal which is selected by the select switch, a clamp circuit for clamping the signal controlled by the gain controller, an analog/digital converter for converting the signal clamped by the clamp circuit, an aspect ratio conversion device for horizontally and vertically converting the digital signal sampled by the analog/digital converter; and a phase-locked loop connected to the analog/digital converter and the aspect ratio conversion device, for correcting an image distortion by controlling a converting clock speed.

Abstract: A signal processing device which makes an adjustment of a displayed picture easy. When a game button 31 of a television is pressed, a picture and a sound from a game unit are selected from among a plurality of inputs, an indicator 10 lights up and a predetermined sound is outputted to confirm for the user that the picture and the sound of the game unit have been selected. When the game button 31 is rotated, preset types of adjustment of the displayed picture, for example, a change to the aspect ratio or a change to the position in which the picture is displayed on a CRT, are carried out.

Abstract: An image processing apparatus is capable of processing image data of different modes without any special conversion process. The apparatus includes a discriminator which discriminates an image data format chosen from among a plurality of image data formats each defined by corresponding displaying format inclusive of aspect ratio format or pixel number format. An auxiliary data recorder records an auxiliary data representative of a chosen data format in a predetermined area of a recording medium. The operation of the discriminator depends on the state of a selecting element disposed on the image processing apparatus for choosing the image data format, thereby suiting it to an user's convenience when recording provided image data in an applied recording medium. The auxiliary data recorder operates in such a manner that the auxiliary data is capable of being reproduced while maintaining a correlation between the auxiliary data and the corresponding image data.

Abstract: A television set includes an integrated receiver decoder. By integrating the receiver/decoder with the television, some circuitry and memory are shared. Moreover, a digital video signal provided by the receiver/decoder need not be converted to an analog NTSC signal before transmission to the television CRT. In one embodiment, where a television having a 16.times.9 aspect ratio is used, on-screen display data is displayed without distortion.

Abstract: Upon NTSC broadcasting, switches are respectively electrically connected to the N sides and a three-dimensional comb filter is made up of memories, a subtracter, etc., whereby a carrier chrominance signal is separated from a video signal in accordance with a frame-to-frame process. In this case, the video signal is divided into two signals, which are in turn written into the memories. Upon EDTV2 broadcasting, the switches are respectively electrically connected to the E sides and a three-dimensional comb filter is made up of the memory and the subtracter, whereby a composite signal obtained by combining a carrier chrominance signal and a horizontal resolution supplementary signal is separated from the video signal. The switch is electrically connected to the E side and a three-dimensional comb filter is made up of the memory, a subtracter, etc., whereby a horizontal resolution supplementary signal is separated from a composite signal in accordance with a field-to-field process.

Abstract: A multi-system video signal demodulating apparatus includes at least a color signal processing unit and a color discriminating function for demodulating a component video signal from video signals of two or more different systems. The multi-system video signal demodulating apparatus includes a detector for detecting continuity between vertical synchronizing signals of the input video signals. The color discriminating function is executed when the detector detects a discontinuity between the vertical synchronizing signals. The continuity between the vertical synchronizing signals of the input video signals is detected. The color discriminating function is executed when a discontinuity between the vertical synchronizing signals is detected during continuity detection. A synchronizing signal of an input video signal is discriminated. A frequency of a color burst signal is discriminated based on a result of the synchronizing signal discrimination.

Abstract: The vertical scanning circuit of an apparatus is of a type which provides a sawtooth whose slope is electrically adjustable, and the apparatus provides the user with circuitry for controlling the position of the lower part of the picture by directly acting on the adjustment of the slope of the sawtooth, even though such an adjustment is generally realized in the factory or during maintenance. To this end, the vertical shift keys (19, 21) of the remote control unit are used to modify the slope of the sawtooth when a menu displayed on the screen is not being used.

Abstract: Image transformation is performed via a video display controlling device. Image data is transformed from an image storage memory having a matrix size of (N+a).times.(M+b) onto a display screen sized to display an image according to N.times.M size matrix. The video display controlling device operates according to any one (or a combination of) several image transformation modes, including a normal mode, an expansion mode, a compression mode, and a moving image mode. These transformations are accomplished by first setting vertical and horizontal addresses of a reference pixel among pixel data stored in the storage memory, and setting an image mode for transforming an original image in a predetermine pattern. Addresses are then generated, in accordance with the set reference pixel and the set image mode, for selecting an N.times.M set of pixel data from among the (N+a).times.(M+b) pixel data in the storage memory.

Abstract: A wide display scream television receiver having a plurality of video display modes, the optimum display mode is automatically selected depending on a kind of material of an input video signal includes a display control for displaying a picture corresponding to the input video signal on the display screen in a plurality of display modes by controllably changing a size of the picture in the horizontal direction and/or vertical direction. The number of horizontal lines from the heading line of each field of the input video signal is counted up with a counter. A detection region setting circuit respectively sets, in the upper and lower regions and the center region of the display screen, the detection region in the predetermined range designated by a single line to a plurality of lines for each field of the input video signal on the basis of the counted value of the counter.

Abstract: A television system 106 and display method for receiving and displaying television broadcasts having various formats. The television system resizes (106) the various received image formats for display on a common display device. Images are resized horizontally by altering the rate at which data is sampled by the television (106). Images are resized vertically by using vertical scaling algorithms which alter the number of lines in an image. Format detection may be done automatically by decoding information contained in the vertical interval of the television broadcast signal, or by counting the number of lines in each frame. The input format may be indicated by a viewer.

Abstract: An apparatus and method for extending the height of an image to display a video signal having a 4:3 aspect ratio on a screen having a 16:9 aspect ratio.

Abstract: A television signal display apparatus includes a main picture quality adjustment value memory for storing a picture quality adjustment value set according to a viewer's preference; a sub picture quality adjustment value memory for storing a picture quality adjustment value preliminarily set for every aspect ratio; a microcomputer for calculating an optimum picture quality adjustment value for a new aspect ratio from the picture quality adjustment values read from the main and sub picture quality adjustment value memories, setting the optimum picture quality adjustment value in a picture quality adjusting circuit and making an aspect ratio selecting circuit work. When the aspect ratio is changed, the viewer can watch a picture having the same picture quality as before the change without the incongruity due to picture quality differences produced by the aspect ratio selection when the picture is of such low luminance that ABL does not function properly.

Abstract: Night vision apparatus including an infrared night vision sensor having a selected field of view and a display panel positioned for displaying an image detected by the sensor, the display panel having a display aspect ratio optimized based upon the horizontal dimension of the field of view of the infrared sensor such that the display aspect ratio decreases as the horizontal field of view narrows.

Abstract: A linearity compensation circuit for a wide-screen television receiver which can uniformly compensate for a picture linearity that may be distorted due to variation of deflection current when a display mode is changed from a 4.times.3 aspect ratio (AR) to 16.times.9 AR, and vice versa. The linearity compensation circuit includes a variable linearity compensation coil which is connected to a horizontal deflection coil, and a control section for varying the inductance value of the variable linearity compensation coil according to change of the 4.times.3 AR and 16.times.9 AR display modes so as to compensate for the linearity of the picture displayed on a display screen.

Abstract: Apparatus and method for automatically adjusting a picture size of a video appliance such as a monitor. According to the apparatus and method, since electrical characteristic data of the video appliance employing the apparatus of the present invention is preset therein, regardless of input of any external data, a user's one time input or automatic picture-adjusting mode selection makes external input data and preset characteristic data be compared, and the horizontal and vertical picture size of the video appliance in the video appliance is automatically adjusted. Therefore, the adjusting step is simplified in the manufacturing process of monitor, promoting productivity, and decreasing the cost thereof.

Abstract: A signal processing circuit achieves a wide display mode without switching on and off an S correction in a horizontal deflecting system, and includes digital memories 16a, 16b and 16c for receiving a luminance signal Y, a color difference signal B-Y and a color difference signal R-Y. The writing operation of each digital memory is controlled by a sampling clock f.sub.CW of a write control circuit 18, and the reading operation of each digital memory is controlled by a sampling clock f.sub.CR of a read control circuit 19. A clock oscillator 24 of the read control circuit 19 produces the sampling clock f.sub.CR whose frequency is varied in accordance with a modulation voltage of a modulation voltage generator 31 in each line interval.

Abstract: A video signal compression apparatus extracts a specific value written in a read only memory at every system clock pulse. The specific value can be varied at every clock pulse. Therefore, for example, only the center cart of a picture can be horizontally compressed A FIFO memory may be used. It is possible to select a mode with a fixed compression ratio or a mode in which a compression ratio varies at every clock pulse. Further, the fixed compression ratio can be set from the outside. Display position or the picture can also be changed.

Abstract: A horizontal size adjusting apparatus of a monitor capable of varying size and linearity of a deflection signal by varying an amount of current supplied to a deflection circuit in accordance with a horizontal frequency includes a first current controlling section for generating a plurality of first control signals to vary the amount of current supplied to the deflection circuit and adjusting a horizontal size by correcting the size and linearity of the deflection signal in accordance with first control signals, a second current controlling section for generating second control signals to vary the amount of current supplied to the deflection circuit by receiving output signals of a decoder and adjusting the horizontal size by correcting the size and linearity of the deflection signal in accordance with the second control signals, and a current output section for supplying the amount of current varied by the first and second current controlling sections to the deflection circuit.

Abstract: A display device includes a gate driver for supplying a corresponding scanning signal to a plurality of scanning signal lines, a source driver for receiving an image signal, extracting an image data from the image signal and supplying the corresponding image data to a plurality of data signal lines, and a display section for displaying the image data based on the scanning signal. The plurality of scanning signal lines is classified into a predetermined first group and a second group. The gate driver supplies a corresponding second scanning pulse signal to scanning signal lines of the predetermined first group and supplies a non-selection signal to scanning signal lines of the predetermined second group based on the sampling control signal when the control signal is in a second state.

Abstract: A picture information detecting apparatus includes a picture area signal output circuit to detect a picture area excluding black band portions from the input video signal to produce a picture area signal to designate the picture area from which picture information is detected. Also included is a picture information detecting circuit for detecting picture information from the input video signal in the designated area. A picture quality compensating circuit is also provided for compensating the video input signal using the detected picture information to produce the gradation compensated video signal. An EDTV 2 discriminating circuit may also be included to determine if the video input signal is an EDTV 2 signal.

Abstract: The graphic board can be mounted inside the expansion slot of the computer, and the frequencies of the horizontal synchronizing signal and the vertical synchronizing signal can be preset finely through presetting the values on the registers from the computer side.At the start of display, the display is carried out in synchronizing frequencies corresponding to the original 640 dots by 400 lines display of the CRT display device (step S100) Then, the synchronizing frequencies are increased gradually to the target values corresponding to the 640 dots by 480 lines display (steps S120 through S140). During this time, the CRT display device will continue synchronization against fluctuation of the frequency within an allowable range with the operation of an internal synchronization circuit. Consequently, the CRT display device can maintain synchronization all through to the target values, and thus a 640 dots by 480 lines display is available.

Abstract: An adaptation of an aspect ratio of a picture signal is effected by providing (1) a second derivative (D2) of an expansion factor (EF) in response to at least one constant value (C1, C2), by providing (3-13) a first derivative (D1) of the expansion factor (EF) in response to the second derivative (D2), by providing (14-21) the expansion factor (EF) in response to the first derivative (D1), and by expanding the picture signal in dependence upon the expansion factor (EF) to adapt the aspect ratio of the picture signal, whereby use of an expansion factor (EF) less than one results in a compression of said picture signal.

Abstract: A picture outputting apparatus in which a plurality of picture signals are selectively entered and displayed on a screen with a picture mode matched to the input picture signals. An optimum screen mode is individually stored in terms of input terminals to which picture signals are entered or the frequencies of the input picture signals. A plurality of picture signals are selectively entered at input units I.sub.1 to I.sub.6. The screen modes are set in association with the plurality of the picture signals. A storage unit 17 stores the screen mode information as set by the setting units 9, 10. A display unit 147 displays a picture corresponding to the optional picture signals selectively entered at the input units I.sub.1 to I.sub.6. A judgment unit 15 judges the sorts of the picture signals entered at the input units I.sub.1 to I.sub.6.

Abstract: A high precision aspect ratio auto-discrimination apparatus used for display apparatuses and television receivers comprising: an apparatus for detecting the upper edge and lower edge of a letter box picture through detecting the average luminance of every horizontal scan period; an apparatus for detecting respective average luminance levels in a plurality of specific regions in one field picture controlled by a horizontal synchronous signal and a vertical synchronous signal; and, an aspect ratio discrimination section to which the outputs of said both apparatuses are input.

Abstract: A method for adjusting the screen size in televisions capable of optionally adjusting vertical and horizontal screen size without setting a number of screen size change modes for a variety of source images so that viewers can watch the screen with the desired size. The method includes the steps of determining whether a screen size change key input has been generated and when it has been determined that the screen size change key input was generated, determining whether a screen expansion key input or a screen contraction key input has been generated. When it has been determined that the screen expansion key input was generated, the method includes incrementing horizontal and vertical size data by one step, respectively, thereby expanding the screen size.

Abstract: A first phase locked loop has an oscillator operating at a first frequency and synchronized with a video signal. A counter in the first phase locked loop generates a plurality of timing signals. A second phase locked loop has an oscillator operating at a second frequency, less than the first frequency, and synchronized with a first one of the timing signals. A switch in a controller selects one of the first and second frequencies as an output. A memory for the video signal has a write clock input coupled to the slower oscillator, a read clock input coupled to the switch, and write and read reset inputs coupled respectively to second and third ones of the timing signals. The controller operates the switch responsive to an input signal. An analog to digital converter has a clamp signal input coupled to a fourth one of the timing signals.

Abstract: A television receiver such as a high definition television (HDTV) receiver and method for receiving a character broadcasting signal, wherein the number of scanning lines used to display character information contained in the character broadcasting signal is varied so as to fully display this character information on a television screen. The television receiver for displaying the character information includes a character broadcasting decoder for decoding a character broadcasting signal; a display for displaying a picture in response to a television signal on which the character broadcasting signal has been superimposed; a video signal amplifier circuit for changing the number of scanning lines used to display the picture on the display means; and data storage RAM for moving the scanning line position where character information by the character broadcasting signal is to be displayed based upon the number of the scanning lines changed by the video signal amplifier circuit.

Abstract: A video transmission apparatus for a video teleconference terminal for displaying video signals with a proper aspect ratio in a video teleconference terminal which transmits and receives video signals representing pictures of different aspect ratios. The video transmitter determines, from among the video signals generated by the cameras having different aspect ratios, which signal should be transmitted to the receiving terminal by a key operation on the operation pad. The result of selection by the operation pad is sent via a video controller to a transmission video signal selector, which selects one of the outputs from the cameras according to the result. The video signal from the selected camera is output to a video signal transmitter as a transmission video signal. A CPU of the video controller recognizes the selecting operation on the operation pad and, accordingly, generates a display control signal which indicates an aspect ratio corresponding to the camera thus selected.

Abstract: Two liquid crystal panels for a first aspect ratio of, e.g., the conventional NTSC or PAL system are used to display an image having the first aspect ratio and an image having a second aspect ratio larger than the first aspect ratio by efficiently using the screens of the panels. For this purpose, right- and left-side liquid crystal panels (16R, 16L) for the first aspect ratio, for displaying images formed by an image signal at positions visible to only right and left eyes, respectively, and driving units (7-15, 17-19) for displaying identical images on the left and right liquid crystal panels when an image is to be displayed at the first aspect ratio, and divisionally displaying the image formed by the image signal on the left and right liquid crystal panels when the image is to be displayed at the second aspect ratio are provided.